Wrench



J. HALBRlTTEH.

WRENCH.

APPLICATION FILED MAY I9, 1920.

Patented Nov. 9, 1920.

2 SHEETS-SHEET 2- f 40 i /a /79 p y JOHN Hannarrrna, or BcSfron, MAssncHUSETTS, Assignee To wALWoR'rHMANUn racruainecorarenr, or Bossen, iaessaennsnrrs, A" coaroaATIoN or MASSA- cHUsETfrs.

WRENCH.

Specification of Letters Patent.

Patented Nov. 9, 1920.

Application filed May 19, 1920. Serial No. 382,548.

To all whom t may concern:

Be it known that I, JOHN HALBMTTER, of Boston, in the county of Suffolk and State of lhlassachusetts, a citizen of the United States, have invented a new and useful Improvement in 1Wrenches, of. which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in explaining its nature.

The' present invention relates to an improvement in wrenches of that type in which a chain or other flexibleA member, passed around the work, acts one of the operating parts.

The invention is essentially an improvement upon the wrench shown and described in Letters Patent of the United States No. 802,187, of Octoberl 17, 1905.

The object of the invention is to provide whereby the wrench may be operated for turning the work in reverse. directions without the renewal or readjustment of the chain or flexible member. A further object is to provide whereby the parts of the wrench may be easily assembled or disassembled or the wearing parts easily replaced as occasion may require.

ihe invention can best be seen and understood by reference to ,the drawings, `in which Figure 1 is a side elevation of the wrench j occupying an engaging position applied to a piece of pipe, the handle of the wrench being shown only in part. x

Fic'. 2 is a plan of the same.

is an interior side elevation of one of the sides or cheeks of the head of the wrench.

Fig. il; is the same as Fig. 1 excepting that one of the sides or cheeks of the wrench is removed and certain of the connecting parts are shown in cross section. The ligure illustrates the engaging position assumed by the operating parts of the wrench for turning the pipe or work in one direction.

liig. 5 is the saine as Fig. et excepting that the operating parts have been moved to assume a changed engaging position for turning the pipe or worl; in a reverse direction to that obtained bythe arrangement shown in Fig. 1, and Y F 6 is a section taken on the line 6 6 of ne Referring to the drawings 1 represents the head of the wrench, 2 the lever with operating handle, 3 the flexible member or chain and t the work.

The head 1 of the wrench 'comprises spaced sides or cheeks 5, 5, respectively. Projecting from the inner faces of these sides are alined butts 6, 6, with meeting ends which preferably llt into'one another. These butts act'to space the sides and whencombined form a bearing with which the end of the lever has engagement, as will later be explained. The sides are fastened by means of a pin or bolt 7 passed through them and through the respective butts and headed against the outer Afaces of theisides. VThe outer ends of the respective sides or cheeks engage the work, and for effecting such engagement` the ends are made substantially V-shaped with opposing jaws 8 and 9, respectively, provided with transverse teeth. Adjacent their inner or rear edges the sides are provided with longitudinal slots 110. Contained to run within theser slots and extending through them is a crosspin or bolt 11 on which the inner end 12 of the lever isfpivotally mounted. The bolt 11 is lheld against lateral displacement and otherwise retained to be movable freely within theslots by fitting the bolt at one end with a head 13 and a washer 15 interposed between it and the outer face of one of the sides, of the head adjacent theslot in it. At the opposite end the boltis provided with `a nut 14 and `washer 15 interposed between it and theother side ofthe head adjacent the slot in it. The nut 14 lits `upon a contracted portion of the bolt.

extending forward from a shoulder 16 on the bolt which lies slightly outside the slot so that when the nut is tightened it and the interposed washer lwill tighten against the shoulder 16, the parts being thereby made secure, butenabling the bolt to be movable yfreelywithin the slots inthe head."

The inner end 12 of the lever `is so reduced as to leave a `space on either side between it and the inner faces of the respective sides 5, 5 ofthe head between whichv it is interposed. Located within the l spaces thus provided and pivotally secured to the body ofthe pin 'or bolt llare' spaced links 17, 17. `These links extend outwar'dlyby the inner faces of the respective" sides and to the outer ends thereof is connected the inner the gripping parts have been released sufiiciently to enable" the wrench to assume a changed position, when the operation may be continued simply by a .tui-ther elevation ot the handle (sec Fig. 5).

It is to be notedthat during the shitting ot' the wrench upon the work for the purpose of obtaining a Jresh grip and especially during the operation ot the wrench for imparting a reverse movement to the work, it is unnecessary to rewrap the chain around the work or reacljust it in any way, the shitting of the wrench on the work or the reverse turning thereof being effected simply by manipulation of the handle. j

Having thus fully described my'invention, l claim and desire to secure by Letters Patent of the United States il. A wrench ofthe type specified comprising a head having work-engaging jaws oppositely arranged, said head having also a stationary bearing, a lever and i'ulcrum member :tor said lever, means for loosely mounting said tulcrum member on said head whereby it be movable toward or away from said stationary bearing, said lever having separate cams arranged to severally engage said bearing depending upon the direction the lever is turned, said cams and stationary bearing occupying such relation to one another that the engagement ot either of the cams with said stationary bearingwill exert pressure' to project said head and re.- tract said tulcrum member, a flexible member connected at one end of said iulcrum member and attachable to said headl` and means for securing such attachment.

2. A wrench of the type Yspecified comprising` a hcadhaving worlt-engmging aws oppositely arranged, said head having` also a stationary bearing,a lever and tulcrum member for said lever, means .for loosely mounting said tulcrum member on said head whereby it may be movable with relation to said stationary bearing toward or away from the same, said lever having separate cams arranged to severally engage said bearing as the lever is moved in reverse directions or occupy a position out ot' engagement with said bearing depending upon the set position ot said lever, said leve1 and stationary bearing occupying` also such relationship that when the cams are out ot engagement with said stationary bearing the Jl'ulcruln member for the` lever will be freely movable on said head toward or away from said bearing and when either of the cams are brought into 'engagement with the stationery bearing torce will be exerted bythe lever to project the head and retract said tulcrum member, a `flexible member connected at one end to said tulcrum member land attachable to said head, and means tor securing such attachment.

3. A wrench of the type specified comprising Va head having connected spaced sides with Work-engaging jaws oppositelyy arranged, said head having also a stationary' bearing between its sides, a lever and fulcrnm member `for said lever, means tor loosely mounting said ulcruin member on said head whereby it and said lever maybe movable toward or away from said stationary bearing, said lever having separate cams arranged to severally engage said stationa ry bearing depending as the lever is turned in .reverse directions or occupy disengaging positions with relation thereto, said cams and stationary bearing being relatively arranged whereby the engagement ot either of the cams with said bearing will exert force acting to project said head and retract said fulcrum member, a flexible member connected at one end to said `tulcrum member and attachable to said head, andy means ter securing such attachment.

Ll. A wrenchof the type speciiied comprising a head having a work-engaging jaw and a stationary bearing, a lever and 'tulcrum member for said lever, means' for Vloot .lv mounting saidi fulcrum mei'nl'er on said head whereby it may be movable toward or away from said stationaryI bearing, said lever having acam arrangedto engage said bearing` as the lever is turned, said cam and stationary bearing occupyingsuch relationship that the engagement ot the cam with said bearing will exert pressure to proiect the head and retract said itulcrum in' bei', a flexible memb connected at oney r said fulcrum member and attachab head, and means for scouring sich ment.

A wrench ot the type 'specified comprisa head having connected spaced with work-engaging aws and an i t posed stationary bearing, a lever and tulcrum member tor said lever, means tor loosely mounting the 'ulcrum member on the sides of said head whereby it may be movable toward and away from the stationary bearing, said. lever having a cam arranged to engage said bearing as the lever is turned and thereby exert pressure to project the head 4and retract said tulcrum member, a flexible member attachable to said head, means tor securing such attacl nent, and means whereby said flexible. in bei' may` be secured to said tulcrum member insidesaid head. p t

l5. A wrench ot' the typo specitied comprising a head having connected spaced sides with work-engaging aws and an interposed stationary bearing, a. lever and tulcrnm member tor said lever, means 'for loosely mounting the tulcrum member on the sides ot' said head whereby it be movable toward and away from the stationary beni.'- ing, said lever having a cam varranged to engage said bearing as the lever is turned and thereby exert pressure to project` the headV and retract said iulcrum member, a et of spaced links mounted upon said 'fulcrum member insideV said head, a lflexible member connected to said links and-attachable to said head, means for vconnecting the flexible member to said links, and means for attaching the flexible member to said head.

7. A wrench ot the type specied comprising a head having connected spaced sides with work-engaging jaws and an interposed stationary beai g, said sides being provided with sockets on the inner sides thereof, a lever and Lulcrum` member .for said lever, means for loosely mounting the ulcrum member on the sides ot said head whereby it may be movable toward and away 'from the stationary bearing, said lever naving a cam arranged to engage said bearing as the lever is turned and thereby exert pressure to 1project the head and retract said ulcrum member, a set ogt spaced links mounted upon said fulcrum member inside said head, a flexible member, a crosspin connecting said flexible member 'to-said links and extending at opposite ends thereoi' to be contained within the sockets inA the inner sides of said head, said dexible member being attachable to said head, and means for securing such attachment;

8. A wrench of the type specified comprising a head having connected spaced sides with work-engaging jaws and an interposed stationary bearing, said sides being provided with sockets on the inner sides thereof, said sockets having' openings into the edges or said sides, a lever and iulcrum member iior said lever, means for releasably and loosely mounting the fulcruinmember-on the sides `of said head whereby it may be movable toward and away from the stationery bearing, said lever having a cam arranged to engage said bearing as the lever is turned andv thereby exert pressure to project the head and retract the ulcrum member, a set or' spaced links releasably mounted upon the ulcrum member inside the head, aflexible member, a crosspin connecting said :flexible member to said links and extending at opposite ends thereof to be contained within the sockets in the inner sides of said head below the openings out of the same and be releasablevfrom said sockets through said openings when `the links are released 'trom the 'fulcrum member, said flexible member; being attachable to said head, and meansv securing such attacnment.

, 9. A wrench oi' the type specified comprising a head having connected spaced sides with work-engaging jaws oppositely arranged, said head having also a stationary bearing interposed between said sides, a

lever and ulcrum member for said lever,

means for loosely mounting said tulcrumV member on the sides of said head whereby it may be movabletoward and away from said stationary bearing, said lever having separate cams arranged to severally engage said bearing as the lever is moved in reverse directions or occupy positions out of engagement with said bearing depending upon the set position of said lever, said cams and stationary bearing beingV also relatively arranged whereby the engagement or" the cams with said bearingV will exert torce for projecting said head 'and retracting said fulcrum member, a set of spaced links connected to said ulcrum member inside said head, a flexible member, means "for connecting the same to said links, said flexible member ybeing attachable to said head, and means tor securing the attachment or the 'llexible member to said head.

l0. A wrench ci the type specified comprising' a head having work-engaging aws oppositely arranged, a lever and 'ulcrum member for said lever, means for loosely mounting said ulcrnm member on said head whereby it may be movable thereon, means whereby pressure may be exerted to project said head and retract said iulcrum member when the lever is moved in reverse directions, a flexible member connected at one end to said 'fulcrum member t0 be movable therewith, said flexible member being attachable to said head, and means for securing such attachment.

11. A wrench of 4the type specified comprising a head having a work-engaging jaw, a lever and ulcrum member for said lever, means for loosely mounting said fulcruni member on said head whereby said head may be projected and said fulcrum member retracted when said lever is turned, a ilexible member connected at one end to said 'fulcrum member and attachable to said head, and means for securing such attachment.

12. A 'wrench-oi' the type specihed comprising ahead having connected spaced sides with work-engaging jaws, a lever and fulcrun'i member Jfor said 1 lever, means for loosely mounting the ulcrum member on the sides of said head to be movable thereon, means whereby said head may be projected and said fulcrum member retracted on turning said lever, a oi' spaced links mounted upon said fulcrum member'inside said head.

JOHN HALsarrfrrn. 

